Central air conditioning has a lot of the current market, people need a certain understanding of them, following a long Sharui ho HVAC for you a brief introduction. 
 Central air conditioning by using the object can be divided into two categories: 
 1, the home central air-conditioning: home central air-conditioning is often referred to as residential central air conditioning, is a small, central air conditioning system, generally mainly used in villas, apartments and some residential buildings. 

 2, commercial central air conditioning: central air conditioning, also known as large-scale commercial central air conditioning for large construction sites, is a centralized air conditioning system, the common use of buildings such as: hotels, hospitals, office buildings and so on. 

 Central air conditioning to cool (heat) source vectors are generally divided into two categories: 

 1, fluoride system: between the host and terminal is connected by copper, and brass by the Freon inside, namely: to fluoride as cold (hot) source of the carrier. So called fluoride system; 

 2, water systems: water used between the host and the end (available: PP-R pipe, galvanized steel pipe, seamless steel tubes, etc.) connected to the pipe interior through the water, namely: the water as cold (hot) source vector. It is known as the water system. 


 By heat pump source can be divided into three categories: 


 1, air-source: the use of heat pump with a small power, absorbing a large number of low-temperature heat in the air, compressed by the compressor into high temperature heat, so efficient and effective use of energy in the air. 

 2, water (surface water, groundwater and urban water supply): the use of shallow geothermal energy surface of the earth such as soil, groundwater or surface water (rivers, sea, lake, or shallow pool) in the absorption of solar energy and 

 The formation of low geothermal energy resources, the use of heat pump principle, by a small amount of high energy input, in the summer use of air-conditioning refrigerant evaporates in the heat out of space, heat the water in a closed circulation, the water temperature is low, so it can be take away the heat efficiently; and winter, the use of closed circulation of refrigerant in the evaporator absorbs heat from the water, by air or water as the temperature of refrigerant after the condenser to enhance heat to the air-conditioned space. 

 3, ground-source (soil): It is a great use of the underground soil thermal storage capacity of heat storage in winter to the heat source to transfer soil from the ground to the building, the ground floor of the summer then transfer to cooling buildings, a year to form a hot and cold cycles, so as to achieve summer cooling and winter heating purposes. 
 These are just the initial introduction of central air conditioning, if you are interested or want to learn more about the central air conditioning, HVAC experts with long Sharui contact Howard.